Cisco Router GigabitEthernet interface can not add ip address?
Router(config)#interface gigabitEthernet 2/1 Router(config-if)#ip add ? % Unrecognized command Router(config-if)#ip add 12.12.12.1 255.255.255.0 ^ % Invalid input detected at '^' marker. who can tell me where is the issue?
my device is CGR1240.
From Cisco documentation:
Port Configuration
The Cisco CGR 1120 has 8 Ethernet ports: 6 FE ports, and 2 GE switch ports. The Cisco CGR 1240 has 6 Ethernet ports: 4 FE ports and 2 GE switch ports. On both of the CGRs, you can configure the 2 GE ports to operate in Layer 2 mode or the default Layer 3 mode. You can convert the switch to Layer 2 mode by using the switchport command.
Note: Layer 2 switching is hardware switched. Layer 3 switching is software forwarding.
The FE ports are 100BaseT Layer 2. Traffic between different VLANs on a switch is routed through the router platform using the switched virtual interface (SVI). You can configure FE switch ports as Layer 3 (routed) ports by configuring the no switchport command on interface fastethernet x/y . By default, FE switch ports are Layer 2.
The GE ports are 1000BaseT Layer 2. Traffic between different VLANs on a switch is routed through the router platform using the switched virtual interface (SVI). You can configure GE switch ports as Layer 2 ports by configuring the switchport command on interface gigabit ethernet x/y . By default, GE ports are Layer 3 (routed ports). Any switch port can be configured as a trunking port to connect to other Cisco Ethernet switches.
The CG-Mech product you should pay attention, from the document:
all the port, no matter FastEthernet or GigabitEthernet if you want to configure ip address, you should set no switchport firstly.
no switchportbefore you can actually add an IP address. You could try to post the full configuration andshow version.